<!DOCTYPE html>
<html>
    <head>
        <script src="http://unpkg.com/vue@next"></script>

    </head>
    <body>
        <div id="app">{{title}}</div>
        <script>
            const app = Vue.createApp({
                setup(){
                    const state = Vue.reactive({
                        title:'hello, vue3!'
                    })

                    return state;
                },
            })

            app.mount('#app');
        </script>

    </body>
</html>